How do I swap these digits?

[Guti14]

This program reads a four-digit integer, and encrypts it. I have had to replace each digit by the sum of that digit plus 7 modulus 10. The final step is the swap digit1 with digit3 and swap digit2 with digit4. But I am not quite sure how to do that. Could somebody help me out please?

#include<iostream>
#include<conio>
using namespace std;

int main(int argc, char* argv[])
{
   int Integer;
   int Divider;
   int Digit1, Digit2, Digit3, Digit4;

   cout << "Enter a four-digit integer: ";
   cin >> Integer;

   Divider = 1000;
   Digit1 = Integer / Divider;

   Integer = Integer % Divider;
   Divider = 100;
   Digit2  = Integer / Divider;

   Integer = Integer % Divider;
   Divider = 10;
   Digit3  = Integer / Divider;

   Integer = Integer % Divider;
   Divider = 1;
   Digit4  = Integer / Divider;

      Digit1 = (Digit1 + 7) % 10;
      Digit2 = (Digit2 + 7) % 10;
      Digit3 = (Digit3 + 7) % 10;
      Digit4 = (Digit4 + 7) % 10;

   cout << Digit1 << Digit2 << Digit3 << Digit4;

   getch();
   return 0;
}

[WaltP]

Move digit1 to temp value
move digit3 to digit1
move temp to digit3

[laserlight]

may not even have to perform the swap:
cout << Digit3 << Digit4 << Digit1 << Digit2;
could also suffice, if the program ends there

[Talliesin]

std::swap?